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JWT Generator

Generate signed JWT tokens locally in your browser. Create JWT tokens online with HS256, HS384, HS512, and RS256.

All processing happens in your browser. Your data never leaves your device.

How to Use JWT Generator

This page is designed for developers who want to generate JWT tokens online for testing, development, and auth debugging. If you searched for generate JWT, create JWT token online, JWT token generator, or generate RS256 JWT token online, this tool covers that workflow directly in the browser.

  1. 1Paste or type your input in the left panel.
  2. 2Click Process or use the keyboard shortcut ⌘↵.
  3. 3View the result in the output panel. Use Copy to copy to clipboard or Download to save as a file.

Best use cases

  • •Create a JWT for local API testing with custom claims and expiration timestamps.
  • •Generate tokens for staging auth flows without sending secrets to an external service.
  • •Test HS256, HS384, HS512, and RS256 payload signing directly in the browser before wiring the token into an app or API client.

This tool processes data locally in your browser. Nothing is sent to external servers.

Examples

Example JWT payload for testing
{
  "sub": "user_123",
  "role": "admin",
  "scope": ["read:users", "write:users"],
  "iat": 1719556200,
  "exp": 1719559800
}

What this JWT generator supports

  • •The generator supports both HMAC-based signing and RS256 for local token creation.
  • •If you need RSA-based JWT testing, you can generate a local test key pair or paste your own private key without leaving the browser.
  • •For best results, pair this page with the JWT Decoder and JWT Verification tools when testing full token workflows or comparing HS256 and RS256 behavior.

Frequently Asked Questions

What algorithms are supported?

HS256, HS384, HS512, and RS256 are supported for browser-side JWT signing.

Is my secret key stored?

No. Everything runs in your browser. Your secret never leaves your device.

Can I create a JWT token online for testing?

Yes. This JWT generator lets you create JWT tokens online for local development, API testing, and auth debugging directly in your browser.

Can I set expiration?

Yes, you can set a custom expiration time in the payload.

What is HS256?

HS256 is HMAC with SHA-256, the most common JWT signing algorithm.

Can I generate RS256 JWT tokens here?

Yes. The tool supports RS256 with a pasted PKCS#8 private key or a locally generated test RSA key pair.

Can I use this for production?

This tool is for development and testing. Always use secure key management in production.

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